<?php // $Id: index.php,v 1.9.2.1 2008/05/02 04:07:29 dongsheng Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This is the main script for the complete XMLDB interface. From here
/// all the actions supported will be launched.

/// Add required XMLDB constants
	require_once('../../lib/xmldb/classes/XMLDBConstants.php');

/// Add required XMLDB action classes
	require_once('actions/XMLDBAction.class.php');

/// Add main XMLDB Generator
	require_once('../../lib/xmldb/classes/generators/XMLDBGenerator.class.php');

/// Add required XMLDB DB classes
	require_once('../../lib/xmldb/classes/XMLDBObject.class.php');
	require_once('../../lib/xmldb/classes/XMLDBFile.class.php');
	require_once('../../lib/xmldb/classes/XMLDBStructure.class.php');
	require_once('../../lib/xmldb/classes/XMLDBTable.class.php');
	require_once('../../lib/xmldb/classes/XMLDBField.class.php');
	require_once('../../lib/xmldb/classes/XMLDBKey.class.php');
	require_once('../../lib/xmldb/classes/XMLDBIndex.class.php');
	require_once('../../lib/xmldb/classes/XMLDBStatement.class.php');

/// Add Moodle config script (this is loaded AFTER all the rest
/// of classes because it starts the SESSION and classes to be
/// stored there MUST be declared before in order to avoid
/// getting "incomplete" objects
	require_once('../../config.php');
	require_once($CFG->libdir.'/adminlib.php');
	require_once($CFG->libdir.'/ddllib.php'); // Install/upgrade related db functions

	admin_externalpage_setup('xmldbeditor');

/// Add other used libraries
	require_once($CFG->libdir . '/xmlize.php');

/// Add all the available SQL generators
	$generators = get_list_of_plugins('lib/xmldb/classes/generators');
	foreach($generators as $generator) {
		require_once ('../../lib/xmldb/classes/generators/' . $generator . '/' . $generator . '.class.php');
	}

/// Handle session data
	global $XMLDB;
/// The global SESSION object where everything will happen
	if (!isset($SESSION->xmldb)) {
		$SESSION->xmldb = new stdClass;
	}
	$XMLDB =& $SESSION->xmldb;

/// Some previous checks
	if (! $site = get_site()) {
		redirect("$CFG->wwwroot/$CFG->admin/index.php");
	}

	require_login();
	require_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM));

/// Body of the script, based on action, we delegate the work
	$action = optional_param ('action', 'main_view', PARAM_ALPHAEXT);

/// Get the action path and invoke it
	$actionsroot = "$CFG->dirroot/$CFG->admin/xmldb/actions";
	$actionclass = $action . '.class.php';
	$actionpath = "$actionsroot/$action/$actionclass";

/// Load and invoke the proper action
	if (file_exists($actionpath) && is_readable($actionpath)) {
		require_once($actionpath);
		if ($xmldb_action = new $action) {
			//Invoke it
			$result = $xmldb_action->invoke();
			if ($result) {
			/// Based on getDoesGenerate()
				switch ($xmldb_action->getDoesGenerate()) {
					case ACTION_GENERATE_HTML:
					/// Define $CFG->javascript to use our custom javascripts.
					/// Save the original one to add it from ours. Global too! :-(
						global $standard_javascript;
						$standard_javascript = $CFG->javascript;  // Save original javascript file
						$CFG->javascript = $CFG->dirroot.'/'.$CFG->admin.'/xmldb/javascript.php';  //Use our custom javascript code
					/// Go with standard admin header
						admin_externalpage_print_header();
						print_heading($xmldb_action->getTitle());
						echo $xmldb_action->getOutput();
						admin_externalpage_print_footer();
						break;
					case ACTION_GENERATE_XML:
						header('Content-type: application/xhtml+xml');
						echo $xmldb_action->getOutput();
						break;
				}
			} else {
				error($xmldb_action->getError());
			}
		} else {
			error ("Error: cannot instantiate class (actions/$action/$actionclass)");
		}
	} else {
		error ("Error: wrong action specified ($action)");
	}

	if ($xmldb_action->getDoesGenerate() != ACTION_GENERATE_XML) {
		if (debugging()) {
			///print_object($XMLDB);
		}
	}

?>
